Heat transfer is one of the largest causes of exergy destruction in modern engines. In this paper, exergy distribution modeling was used to determine the potential of reduced engine heat transfer to provide significant gains in engine efficiency. As known from prior work, of itself, reducing heat transfer creates only a small increase in efficiency-most of the exergy is redirected into the exhaust stream-requiring both mechanical and thermal recovery of the exhaust exergy. Mechanical regeneration, through turbocharging and over-expansion, can lead to efficiencies exceeding 50%. Adding thermal regeneration, through high enthalpy steam injection or a bottoming cycle, can increase the efficiency potential to approximately 60%. With implementation of both mechanical and thermal regeneration, the only remaining cause of substantial exergy destruction is the combustion process. Thus, efficiency gains significantly beyond 60% are only possible by reducing the entropy generated in the fuel conversion process.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Exploring the Pathway to High Efficiency IC Engines through Exergy Analysis of Heat Transfer Reduction


    Weitere Titelangaben:

    Sae Int. J. Engines


    Beteiligte:
    Johnson, Bernard (Autor:in) / Edwards, Chris (Autor:in)

    Kongress:

    SAE 2013 World Congress & Exhibition ; 2013


    Erschienen in:

    Erscheinungsdatum :

    2013-04-08


    Format / Umfang :

    17 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Energy and exergy analysis of hydraulic free-piston engines

    Wang, Lei / Zhao, Zhenfeng / Yu, Chuncun et al. | SAGE Publications | 2019


    Study on Maximizing Exergy in Automotive Engines

    Takahashi, K. / Shinohara, M. / Ibaraki, S. et al. | SAE Technical Papers | 2007


    Study on miximizing exergy in automotive engines

    Endo,T. / Kawajiri,S. / Kojima,Y. et al. | Kraftfahrwesen | 2007


    Study on Maximizing Exergy in Automotive Engines

    Endo, T. / Kawajiri, S. / Kojima, Y. et al. | British Library Conference Proceedings | 2007